Bronica Etrs shutter problem

I bought a bronica etrs about a month ago. It had been working fine till a couple days ago that I noticed. Now the shutter speed wont physically change no matter what speed the dial is at. Since I had already ran a few rolls through it and even checked the shutter when I first got it. I thought the battery might of died and it was running on the mechanical 1/500th. But I bought a new battery for it and the shutter still doesn't work properly. It appears to be firing on a consistent shutter speed and the aperture does close properly. But there is a red light that appears on the bottom right of the viewfinder showing that the battery is making contact.I tried two methods to check if its a problem with the lens or body and they're both working properly. I had read online that its good to use a silver oxide battery but when my camera worked it used a lithium battery. I'd rather not send it out to get it a CLA since that'll cost more than a new lens or body. Has anybody had this problem and found a way to fix it?

With the lens wide open, you're actually seeing no change in the leaf shutter's speed, right?

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Yeah the speed looks the same and it does it when I have the aperture stopped down too

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Mentioned wide open only to facilitate watching the leaf shutter work--aperture has no effect on the lens's shutter. What's up with the film you shot? Battery type shouldn't be critical. Lens/body contacts clean? Do you have a metered or prism finder?

Mentioned wide open only to facilitate watching the leaf shutter work--aperture has no effect on the lens's shutter. What's up with the film you shot? Battery type shouldn't be critical. Lens/body contacts clean? Do you have a metered or prism finder?

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I shoot regular 120 film, the contacts look good and clean, and I use a prism finder

Mentioned wide open only to facilitate watching the leaf shutter work--aperture has no effect on the lens's shutter. What's up with the film you shot? Battery type shouldn't be critical. Lens/body contacts clean? Do you have a metered or prism finder?

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I shoot regular 120 film, the contacts look good and clean, and I use a prism finder

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But you said in your opening post that you'd shot several rolls with this camera. How'd those turn out? Have you shot anything "post-problem?"

But you said in your opening post that you'd shot several rolls with this camera. How'd those turn out? Have you shot anything "post-problem?"

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Ohh yeah I had put about 4 rolls through it, as of exposure it looks accurate except for the last photo on the last roll. It was really underexposed, I had the camera set to 1/8th at the time which is what my light meter read so that's probably when it started messing up. Other than that one exposure I havent shot anything after it